Verfahrenstechnische Analyse von elektrochemischen Energieumwandlungssystemen

Divisek, J.

Book/Report

FZJ-2019-03387

Verfahrenstechnische Analyse von elektrochemischen Energieumwandlungssystemen

Divisek, J. (Corresponding author)FZJ*

1997
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag Jülich

Jülich : Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag, Berichte des Forschungszentrums Jülich 3469, 153 p. (1997)

Please use a persistent id in citations: http://hdl.handle.net/2128/22340

Report No.: Juel-3469

Abstract: This study deals with the thermodynamic, electrode-kinetic and structural aspects considered by the author in the design and construction of the electrolysers and fuel cells. Three topics are treated: material stability for alkaline water electrolysis, reaction kinetics and mechanisms of the hydrogen and oxygen reactions as well as structural aspects of fuel cells. Firstly, the thermodynamic aspects of the structural materials of an alkaline water electrolyser are presented. The second range of issues concerns the electrode kinetics of the electrochernical reactions of hydrogen and oxygen. In this connection, the problem of elucidating the reaction mechanism involved is a fundamental topic. An analysis of the reaction mechanism of the electrochernical reactions is discussed based on the numerical computer evaluation of a reaction mechanism presumed probable. The example of the design of the SOFC cermet anode is, furthermore, used to show that the electrochemical kinetics does not only represent the problem of mechanistic considerations but that spatial and structural effects also play an important part. The third topic concerns methods of calculating and designing the water electrolyser and fuel cells. As an example, the two-dimensional calculation of the methanereforming reaction in the anode compartment of the ceramic high-temperature solid oxide fuel cell (SOFC) is shown. As a further example, the three-dimensional mathematical modelling of the low-temperature fuel cell with a polymer electrolyte membrane (PEM) is presented in an abbreviated form.

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